Question

We took a one-meter rod and marked 4 points on it such that each segment is of equal length.

What is the length of the line segment OA?

• A. 2 m
• B. 2000 mm
• C. 20 cm
• D. 2 cm

Answer 1

The correct option is C 20 cm

OE = 1 m = 100 cm (Given it is a metre scale)
Since the metre scale is divided into 5 equal parts, each part is equal to one fifth of OE.

Hence, $OA=\frac{1}{5}\times OE$
$\Rightarrow OA=\frac{100}{5}=20cm$